Troops have been sent to protect aid workers against attack.

已经派出部队保护援助工作人员免遭袭击。

《牛津词典》

At the end of the day, these kinds of systems are primarily designed to protect against the sort of opportunistic smash-and-grab attack that makes up the majority of burglaries.

归根结底，这类系统主要用于防止投机取巧的砸橱窗抢劫袭击，大部分的入室盗窃都属于这类袭击。

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These kinds of systems are primarily designed to protect against the sort of opportunistic smash and grab attack that makes up the majority of burglaries.

这类系统主要用来防止投机取巧和掠夺，这造成了大多数入室盗窃。

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In patients, the bodys natural defenses against disease seem to attack the person they are supposed to protect.

VOA: special.2010.03.16

While the U.S. must continue efforts to dismantle terrorist organizations and protect Americans against attack, "This war, like all wars, must end, " the president said at the National Defense University.

WSJ: Obama Narrows Scope of Counterterrorism Fight

Mr Ferrante and Mr Auriemma said players could protect themselves against potential attack by stopping Origin launching games via desktop shortcuts.

BBC: Players at risk from game store hack attack

It is designed to protect members against physical attack.

ECONOMIST: Cyberwarfare